/Engine/Plugins/Experimental/RenderGrid/Source/RenderGrid/Public/RenderGrid/RenderGrid.h
In here, you could for example obtain jobs from an external source and add them to the queue.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintImplementableEvent, Meta=(DisplayName="BeginBatchRender")) void ReceiveBeginBatchRender ( [URenderGridQueue](API\Plugins\RenderGrid\RenderGrid\URenderGridQueue) * Queue )